<template>
  <div>
    <!-- 行内表单 -->
    <el-form :inline="true">
      <el-form-item>
        <el-button type="primary"
                   @click="dialogVisible = true">新增</el-button>
      </el-form-item>
    </el-form>

    <el-table :data="tableData"
              v-loading="loading"
              style="width: 100%;margin-bottom: 20px;"
              row-key="id"
              border
              stripe
              default-expand-all
              :tree-props="{children: 'children', hasChildren: 'hasChildren'}">
      <template slot="empty">
        <el-empty :image-size="400"></el-empty>
      </template>
      <el-table-column prop="name"
                       label="名称"
                       sortable
                       width="180">
      </el-table-column>

      <el-table-column prop="perms"
                       label="权限编码"
                       sortable
                       width="180">
      </el-table-column>

      <el-table-column prop="icon"
                       label="图标">
      </el-table-column>

      <el-table-column prop="type"
                       label="类型">
        <template slot-scope="scope">
          <el-tag size="small"
                  v-if="scope.row.type === 0">目录</el-tag>
          <el-tag size="small"
                  v-else-if="scope.row.type === 1"
                  type="success">菜单</el-tag>
          <el-tag size="small"
                  v-else-if="scope.row.type === 2"
                  type="info">按钮</el-tag>
        </template>
      </el-table-column>

      <el-table-column prop="path"
                       label="菜单URL">
      </el-table-column>

      <el-table-column prop="component"
                       label="菜单组件">
      </el-table-column>

      <el-table-column prop="orderNum"
                       label="排序号">
      </el-table-column>

      <el-table-column prop="statu"
                       label="状态">
        <template slot-scope="scope">
          <el-tag size="small"
                  v-if="scope.row.statu === 1"
                  type="success">正常</el-tag>
          <el-tag size="small"
                  v-else-if="scope.row.statu === 0"
                  type="danger">禁用</el-tag>
        </template>
      </el-table-column>

      <el-table-column prop="icon"
                       label="操作">
        <template slot-scope="scope">
          <el-button type="text"
                     @click="editHandle(scope.row.id)">编辑</el-button>
          <el-divider direction="vertical"></el-divider>
          <template>
            <el-popconfirm title="确定删除吗？"
                           @confirm="delHandle(scope.row.id)">
              <el-button type="text"
                         slot="reference">删除</el-button>
            </el-popconfirm>
          </template>
        </template>
      </el-table-column>

    </el-table>

    <!--新增对话框-->
    <el-dialog title="提示"
               :visible.sync="dialogVisible"
               width="600px"
               :before-close="handleClose">

      <el-form :model="editForm"
               :rules="editFormRules"
               ref="editForm"
               label-width="100px"
               class="demo-editForm">
        <!-- 循环遍历生成树状结构的下拉框选项内容，先遍历第一层，再遍历第一层的children，添加"——"作为子菜单的区分标志。
				也就是循环遍历中嵌套循环遍历。菜单的数据类型也是树状结构
				v-model="editForm.parentId"：下拉框的值
				:value="child.id" 每个下拉项的值
				 -->
        <el-alert title="0代表创建新的一级目录"
                  :closable="false"
                  type="info"
                  style="line-height: 5px;width:39%;left:18%;"></el-alert>
        <el-form-item label="上级菜单"
                      prop="parentId">
          <el-select v-model="editForm.parentId"
                     placeholder="请选择上级菜单">
            <el-option :label="创建新的目录"
                       :value="0"></el-option>
            <template v-for="item in tableData">
              <el-option :label="item.name"
                         :value="item.id"
                         :key="item.id"></el-option>
              <template v-for="child in item.children">
                <el-option :label="child.name"
                           :value="child.id"
                           :key="child.id">
                  <span>{{ "—— " + child.name }}</span>
                </el-option>
              </template>
            </template>
          </el-select>
        </el-form-item>

        <el-form-item label="菜单名称"
                      prop="name"
                      label-width="100px">
          <el-input v-model="editForm.name"
                    autocomplete="off"></el-input>
        </el-form-item>

        <el-form-item label="权限编码"
                      prop="perms"
                      label-width="100px">
          <el-input v-model="editForm.perms"
                    autocomplete="off"></el-input>
        </el-form-item>

        <el-form-item label="图标"
                      prop="icon"
                      label-width="100px">
          <el-input v-model="editForm.icon"
                    autocomplete="off"></el-input>
        </el-form-item>

        <el-form-item label="菜单URL"
                      prop="path"
                      label-width="100px">
          <el-input v-model="editForm.path"
                    autocomplete="off"></el-input>
        </el-form-item>

        <el-form-item label="菜单组件"
                      prop="component"
                      label-width="100px">
          <el-input v-model="editForm.component"
                    autocomplete="off"></el-input>
        </el-form-item>

        <el-form-item label="类型"
                      prop="type"
                      label-width="100px">
          <el-radio-group v-model="editForm.type">
            <el-radio :label=0>目录</el-radio>
            <el-radio :label=1>菜单</el-radio>
            <el-radio :label=2>按钮</el-radio>
          </el-radio-group>
        </el-form-item>

        <el-form-item label="状态"
                      prop="statu"
                      label-width="100px">
          <el-radio-group v-model="editForm.statu">
            <el-radio :label=0>禁用</el-radio>
            <el-radio :label=1>正常</el-radio>
          </el-radio-group>
        </el-form-item>

        <el-form-item label="排序号"
                      prop="orderNum"
                      label-width="100px">
          <el-input-number v-model="editForm.orderNum"
                           :min="1"
                           label="排序号">1</el-input-number>
        </el-form-item>

        <el-form-item>
          <el-button type="primary"
                     @click="submitForm('editForm')">确定</el-button>
          <el-button @click="resetForm('editForm')">重置</el-button>
        </el-form-item>
      </el-form>

    </el-dialog>
  </div>

</template>

<script>
export default {
  name: "Menu",
  data () {
    return {
      loading: false,//loading标识符
      dialogVisible: false,  //某些组件是否显示（是否可操作）的标识
      editForm: {
        //编辑表单，会请求后端获取，会用信息回填设置属性和数据
      },
      editFormRules: {
        parentId: [
          { required: true, message: '请选择上级菜单', trigger: 'blur' }
        ],
        name: [
          { required: true, message: '请输入名称', trigger: 'blur' }
        ],
        perms: [
          { required: true, message: '请输入权限编码', trigger: 'blur' }
        ],
        type: [
          { required: true, message: '请选择状态', trigger: 'blur' }
        ],
        orderNum: [
          { required: true, message: '请填入排序号', trigger: 'blur' }
        ],
        statu: [
          { required: true, message: '请选择状态', trigger: 'blur' }
        ]
      },
      tableData: [] //表格信息。会请求后端获取
    }
  },
  created () {
    this.getMenuTree()
  },
  methods: {
    getMenuTree () {
      this.loading = true
      this.$axios.get("/sys/menu/list").then(res => {
        this.tableData = res.data.data
        this.loading = false
      })
    },
    submitForm (formName) {
      this.$refs[formName].validate((valid) => {
        if (valid) {
          this.$axios.post('/sys/menu/' + (this.editForm.id ? 'update' : 'save'), this.editForm)
            .then(res => {
              this.$message({
                showClose: true,
                message: '恭喜你，操作成功',
                type: 'success',
              });
              this.getMenuTree()
              this.resetForm('editForm')
              this.dialogVisible = false
            })
        } else {
          console.log('error submit!!');
          return false;
        }
      });
    },
    //编辑功能回填表单数据用
    editHandle (id) {
      this.$axios.get('/sys/menu/info/' + id).then(res => {
        this.editForm = res.data.data

        this.dialogVisible = true //打开新增对话框
      })
    },
    resetForm (formName) {
      this.$refs[formName].resetFields();
      this.dialogVisible = false
      this.editForm = {}
    },
    handleClose () {
      this.resetForm('editForm')
    },
    delHandle (id) {
      this.$axios.post("/sys/menu/delete/" + id).then(res => {
        this.$message({
          showClose: true,
          message: '恭喜你，操作成功',
          type: 'success',
        });
        this.getMenuTree()
      })
    }
  }
}
</script>

<style scoped>
</style>